Photographic-plate holder.



PATBNTED APB.. 16v, 1907.

P. GRASSMANN. PHOTOGRAPHIU PLATE HOLDER.

APPLIGATION FILED MAY'5, 41905.

kan w Elwin/M7 M7# UNllTED STATES .PATENT PHOTGRAPHEC=PLATE HOLDER..

l nopseoeee.

Specification of Letters Patent.

Patented April 16, 1907'.

Application led May 5, 1905. Serial No4 259,030.

To rf//Z 'LU/wim 7215 711,503/ concern.:

Be it known that l, EETER GRAssMANN, mechanical engineer, a subject ofthe German Emperor, and a resident ol' No. 2 Blumenstrasse,Gross-Licl/iterfelde-Ost, in the State of Prussia and Empire of Germany,have invented certain new and useful improvements in Photographic-PlateHolders; and l do hereby declare that the following is a full, clear,and exact specification thereof.

The invention relates to photographicplate holders for use with glassplates, flat rilms, or negative paper, which likewise forms thereceptacle in which said plates or films are sold.

The invention consists, broadly, of a plate or lilm carrier carrying theplate or film in a sort oi' maslr and provided with a retainingstrip,over which carrier a light-tightv casing oi' cardboard or the like, alsoserving as eX- posing-slide, is p assed in such a manner as to be heldunder the sides of the retainingstrip, which are bent up on both sidesand do thereby provide a reliable light-tight slide or obturating means.The casing, serving also as exposing-slide, is provided with a metal rim'for the purpose of inem-basing` its stability, as is necessary in thisconnection, the edge likewise serving` for uniting the twoslide-surfaces.

The exposure takes place in arear lighttight adapter, in which theretaining-strip of the plate or iilm carrier is suitably supported so asto prevent it from being withdrawn inopportunely.

in the drawings, Figure 1 is a side elevation of the plate-holder. Fig.2 is a crosssection through the same. Fig. 3 shows the arrangement ofthe retaining-strip and one plate, and Fig. 4 the same with two plates.

The plate-holder consists oi the plate-carrier a, upon which one or twophotographic plates b are mounted by means of a mask and at the end ofwhich a retaining-strip d is provided. Over the carrier a is passed alight-tight casing c, the lateral members of which are held under theturned-up sides e,

which are likewise specially shaped at the end in order to 'facilitatethe insertion. The casing c is provided with a metal rim 7L, by means orwhich its members are given the stability required for the purpose ofinserting it, this rim 7L also permitting of uniting these members onewith the other more readily.

The adapter serving 'for the exposure must be pro vided with a stop uponwhich the edges e oi the retaining-strip d may 'iind a bearing, so thatwhen the casing c is withdrawn the carrier a may be prevented fromcoming with it.

in order to make the exposure, the lighttight casing c is drawn downfrom oil the plate or film carrier e, and after the exposure has beenmade the casing is again pushed over the carrier until the slide membershave been firmly inserted beneath the sides e of the retaining-strip d.

Having now particularly described my said invention, what -l claim asnew, and desire to secure by United States Letters Patent, is-

l. A photographic-plate holder comprising` a carrier and provided with amask f, a retaining-strip d secured to the top edge of said holder andprojecting outwardly and downwardly and a easing oi" light-proofmaterial slidable over said holder and having its end edges adapted topass under the edges of the retaining-strip.

2. A photographic-plate holder comprising a carrier made oi' cardboard,a metal strip secured to the top edge thereof, said strip havingprojecting edges and a casing also made of cardboard sliding over saidcarrier and having its end edges passing under the edges of the metalstrip said casing having its edges bound in metal.

In witness whereof l have hereunto set my b and in presence oi twowitnesses.

PETER GRASSMANN.

litnesses VOLDEMAR HAUPT, HENRY Hnsrnn.

